Shell Programming and Scripting

Dear friends,

I need help .. some will say again ; )

I've got a shell script (KSH) with interactive options.

One of the option should match a numeric value but also look inside a file and check if the numeric value match the numeric value chosen.

I've got a function to check if the numeric value is enter is correct from 1 to 7. So the numeric value cannot be 0 or 8 or 10 etc ..

But I am wondering how I could enter a control between the value enter and check if this value exist on the file read ?

How will you do this ?

Thanks for your help.

Hi,
could you paste the code you have? (deleting important information)

Code:

#!/bin/bash
echo -n "enter a number:"
read number
grep -q $number myfile
if [ $? -ne 0  ] then
  echo "number not founf"
fi

grep -q only returns status, does not display anything.

Hello thanks for your quick reply

On first parameter looks like this :

Code:

liste_release[1]="1"
liste_release[2]="2"
liste_release[3]="3"
liste_release[4]="4"

the function that control the value enter looks like this :

Code:

fct_verif_rel ()
{
#
#
i=1
while [ $i -lt 5 ]
do
  if [ $id_release = ${liste_release[$i]} ]
  then
    break
  else
    let i=$i+1
  fi
done
if [ $i -eq 5 ]
  then
  echo "   message \""$id_release"\" not valid"
  echo " "
  fct_usage
fi
}

but I don't know how and where I should enter a control that should read a file and check if the value enter exist and then continue or warning if the numeric value does not exist..

thanks

I think the solution posted by jim mcnamara is good:

I will have to try ... I can't do it right now but I think this will not work so easy because the file that should read to check if the value exist looks like this :

1 20100501 20100531
2 20100601 20100630
3 ..etc

I can use awk to exract the first part but I don't know how I could get the first part as value to compare with the value enter. I am not sure to be clear

Thanks

try then with:

Code:

grep -q "^$id_release " yourfile

so you search for then number at the beginnig of the line.